Newsgator, RSS feed in your outlook!
This is a pretty cool Tool!
NewsGator is a "news aggregator" that runs in Microsoft Outlook. It allows you to subscribe to various syndicated news feeds (such as weblogs, news sites, etc.) and have news from these sites be delivered right into your Outlook folders. There are thousands of sites which syndicate their content in RSS format, and many more being added every day.
And new for 1.3 - also read NNTP newsgroups in NewsGator!